KR102266351B1 - fan shaft ground - Google Patents

Abstract

(a) a stator comprising an impeller having (i) one or more magnets, and (ii) a cup containing the magnets; (b) a stator comprising (i) a shaft, and (ii) a motor winding; (c) printed circuit boards; and (d) a contact spring extending between the shaft and the printed circuit board to ground the shaft.

Description

fan shaft ground

The present teachings relate to an air mover with improved grounding.

The air mover includes a rotor and a stator. In general, the impeller shaft of the rotor extends through the stator and the rotor rotates about the stator. During movement of the rotor around an arbor, electromagnetic radiation may be generated within the system. Electromagnetic radiation can build up within the system and interfere with the performance of one or more components of a vehicle, such as a radio. An attempt was made to ground various parts of the air mover.

Some examples of attempts to ground a fan are described in US Pat. Nos. 6,452,298; 8,183,727; and 8,314,522 and US Patent Application Publication Nos. 2011/0050011 and 2015/0180301, the teachings of which are expressly incorporated herein by reference for all purposes. It would be desirable to have a motor grounded through the printed circuit board during the installation of the printed circuit board. One or more contact springs to ground the motor without additional installation steps are required. It would be desirable to have one or more contact springs that contact the shaft and printed circuit board and remove electromagnetic radiation from the system so that the electromagnetic radiation does not interfere with surrounding electrical components.

The teachings of the present invention provide (a) a stator comprising an impeller having (i) one or more magnets, and (ii) a cup for receiving the one or more magnets; (b) a stator comprising (i) a shaft, and (ii) a motor winding; (c) printed circuit boards; and (d) one or more contact springs extending between the shaft and the printed circuit board to ground the shaft.

The present teachings provide a motor that is grounded through the printed circuit board during installation of the printed circuit board. The present teachings provide one or more contact springs to ground the motor without additional installation steps. The present teachings provide one or more contact springs that contact the shaft and printed circuit board and remove electromagnetic radiation from the system such that the electromagnetic radiation does not interfere with surrounding electrical components.

1A shows a perspective view of a blower;
1B shows a cross-sectional view of the blower along line II;
2A shows a top view of one or more contact springs and a printed circuit board;
2B shows a top view of one or more contact springs and a printed circuit board;
3a shows an enlarged view of one or more contact springs proximate a gap in the stator;
3B shows an enlarged view of one or more contact springs through a gap in the stator;
4A shows an enlarged view of one or more contact springs and a printed circuit board;
4B shows an enlarged view of one or more contact springs and a printed circuit board;
5 shows a top view of a printed circuit board and one or more contact springs;
6A shows a top view of one or more contact springs;
6B is a side view of one or more contact springs of FIG. 6A;
6C is a cross-sectional view of one or more contact springs of FIG. 6A;
7A shows a top view of one or more contact springs;
7B is a side view of one or more contact springs of FIG. 7A;
7C is a cross-sectional view of one or more contact springs of FIG. 7A;
8 shows a top view of one or more contact springs connected to a printed circuit board, in a removed state;
9 is a side perspective view of one or more contact springs in an installed state;
10 shows a side view of one or more contact springs in an installed state;

The description and examples presented herein are intended to enable those skilled in the art to understand the present invention, its principles, and practical applications. Those skilled in the art will be able to adapt and apply the present invention in numerous forms as may be best suited to the requirements of a particular application. Accordingly, the specific embodiments of the present disclosure presented are not intended to be exhaustive or to limit the teachings. Accordingly, the scope of the teachings should not be determined with reference to the foregoing description, but should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are to be accorded. The disclosures of all articles and references, including patent applications and publications, are incorporated by reference for all purposes. Other combinations are possible, which can be obtained from the following claims, which are also incorporated herein by reference.

The present teachings may be used with any fan, blower, air mover, similar device for moving air, a motor having a motor coil, or a combination thereof. As discussed herein, fan, blower, and air mover are used interchangeably, and use of the term fan refers to a blower, air mover, or any other device that moves a fluid such as air, or a combination thereof. is intended to include The fan may function to move air from a first location to a second location to provide heat, remove heat, provide cooling, or a combination thereof. A fan can move air within the component. For example, a fan may move air into a cooling cabinet or housing that contains equipment, electrical components, or both. The fan may be located in the vehicle. Preferably, the fan can be connected to the vehicle seat. The fan may be attached to or located below the bun of the seat, the back of the seat, or both. The fan may extend into a cushion of the vehicle seat such that the fan is positioned within the vehicle seat. The fan may be stopped during use (eg, with an insert, seat cushion, seat frame, or a combination thereof). Preferably, the fan can be connected to the vehicle battery. A fan may be used in a vehicle to move a fluid through the vehicle seat. More preferably, the fan may be a low profile fan.

The present teachings are premised on providing a fan (ie blower) comprising a housing, an impeller, a motor, and a control device (eg circuitry). The housing partially and/or completely encloses the components of the fan and may function to create a pressure differential to move air, protect circuitry, or provide a combination thereof. The housing may enclose all functional components of the fan. The housing may connect the fan to a channel, an air source, a thermoelectric device, and may include a thermoelectric device or a combination thereof. The housing may connect the fan to one or more devices such that the fan is maintained within the device and/or system. For example, a fan may be connected to the seat by a housing such that the fan moves air through the seat. The stator may be connected to the housing such that the stator supports the rotor.

The rotor may function to rotate and move the air. The rotor may rotate about an axis, a shaft, or both. The rotor may rotate about the impeller shaft. The rotor may be located within one or more bearings and/or may include one or more bearings such that friction rotation of the rotor is low. The rotor may include one or more magnets, cups, impellers, or combinations thereof. The rotor may be an impeller or may include an impeller that functions to move air. Impellers can push air, attract air, or both. The impeller can be made of any material that allows the impeller to move air. Preferably, the impeller is made of plastic or a lightweight material. The impeller may be made of a molded material, an injection molded material, or both. The impeller may be made of metal. The impeller may be large enough to cause the impeller to move a sufficient amount of air to heat and/or cool the occupant, user, location of interest, or a combination thereof. The impeller may be small enough so that the rotor fits within the component and preferably within the vehicle component. Preferably, the impeller can be formed by injection molding and/or overmolding. The impeller may be molded around a cup, impeller shaft, one or more magnets, a plurality of magnets, or a combination thereof to form a rotor.

The cup may substantially enclose the stator, house one or more magnets, be coupled to the impeller shaft, or function as a combination thereof. The cup may be a part included as a part of the impeller. The cup may form a connection with the impeller to counterbalance the impeller, and the impeller may be positioned relative to the impeller shaft or both. The cup may be fixedly connected to the impeller shaft. The cup may connect the impeller shaft to the impeller. The cup may be permanently connected to the impeller shaft. The cup may be fixedly connected to one or more magnets such that the one or more magnets are not directly connected to the impeller, the one or more magnets move the impeller around the stator, or both. The cup may be at least partially molded to the impeller, press fit to the impeller, or both. The cup may be connected to a single annular magnet. Preferably, the cup is connected to one or more magnets and even to a plurality of magnets.

The one or more magnets may function to move the rotor during operation of the fan. The one or more magnets may be solid annular magnets. The one or more magnets may be segments of magnets connected to the cup to form a ring. One or more magnets may rotate about the stator when the windings are activated. An electromagnetic field may act on the magnet to cause the magnet to move the impeller. The rotor may include a sufficient amount of one or more magnets to cause the rotor to rotate, air to move, or both. The one or more magnets may be positioned relative to the stator by position of the cup, connection of the one or more magnets to the cup, or both.

The position of the cup can be determined by connection with the impeller shaft. The impeller shaft may function to form a movable connection with the stator such that the rotor is movable. The impeller shaft is press-fitted into one or more bearings so that the impeller shaft rotates with the impeller but connects the rotor to the stator. An end of the impeller shaft may extend beyond the bearing to create a bearing surface. The bearing surface may be at an end of the impeller shaft that contacts a portion of the housing as the rotor rotates. The end of the impeller shaft may not contact the housing. The end of the impeller shaft may move relative to the housing so that it sometimes contacts against the housing and at other times the impeller shaft does not contact the housing. The bearing surface may be a low friction surface in contact with the housing to support the rotor so that the rotor does not move axially in the first direction. The impeller shaft may be molded into the impeller such that a connection is formed between the impeller shaft and the cup, the impeller, or both. The impeller shaft may be press-fitted into the cup, impeller, or both to form a connection. Preferably, the impeller shaft is welded to the cup to form a connection. The impeller shaft and cup may be welded together by any welding method to form a fixed connection. The impeller shaft and cup may be welded together by laser welding, ultrasonic welding, friction welding, arc welding, tig welding, solid state welding, or a combination thereof. The impeller shaft and cup can be welded in any way so that the cup is balanced against the cup when the connection is complete. Welding may add additional material to form the connection. Welds may have no additional material to form the connection. The impeller shaft may be press-fitted into the cup to form a weld. Welds can only be on the outside of the cup or inside the cup. The welding may be a continuous welding around the periphery of the impeller shaft. Welds may be placed intermittently around the impeller shaft. The impeller shaft, the cup, or both may be free of a tapered portion that helps form a connection between the cup and the impeller shaft. The cup may extend in a direction substantially perpendicular to the impeller shaft, and the connection may be formed such that the cup and the impeller shaft remain substantially vertical without the use of a tapered portion. The impeller shaft may align the rotor with the stator.

The stator can function as either coupling the rotor to the housing, rotating the rotor, or both. The stator may substantially rotate the rotor about an axis of rotation. The stator may be connected to a housing, one or more bearings, one or more printed circuit boards, or a combination thereof. The stator may have one or more windings that move the rotor through one or more magnets of the rotor. When energized, one or more windings can create an electric field that moves the rotor and impeller so that air moves. The rotor may be press-fitted into the stator or include a portion that is press-fitted into the stator (eg, an impeller shaft). The impeller shaft of the rotor may be connected to one or more bearings, and then the one or more bearings and the impeller shaft may be disposed on the stator. The stator may include one or more motor coils, one or more shafts, one or more feet, or a combination thereof.

The one or more motor coils function to create an electric field that moves the rotor when the coil is energized. The one or more motor coils may be a plurality of coils extending about an axis, and produce an electromagnetic field that moves the rotor when energized, which may also produce electromagnetic radiation. The one or more motor coils may be a plurality of motor coils. The one or more motor coils may be equal to the number of magnets. There may be one or more motor coils than magnets or there may be one or more magnets than motor coils. One or more motor coils may be electrically connected to the printed circuit board. The one or more motor coils may each include a plurality of wires (eg, copper wires). One or more motor coils may be coupled to, or located proximate to, one or more shafts.

One or more shafts serve to mechanically ground the stator or connect the stator to the housing. One or more shafts may connect the stator to the housing. One or more axes may be made of metal, dielectric, or both. One or more shafts may support one or more motor coils. One or more shafts may be connected to one or more bearings. One or more bearings may be press-fitted into the shaft such that the shaft supports one or more bearings, the impeller shaft, or both. The one or more impeller shafts may extend into one or more shafts. One or more axes may extend into a central recess of the printed circuit board. One or more axes may contact one or more contact springs when the printed circuit board is mounted about the one or more axes. One or more axes may focus electromagnetic radiation, ground the motor coil, or both. The one or more shafts, the one or more motor coils, the motor coil housing, or a combination thereof may include one or more feet.

One or more bearings may function to allow rotation of the rotor about the shaft while the shaft remains static. The one or more bearings may rotatably support the rotor, the impeller shaft, or both while the rotor rotates about an axis of rotation. The one or more bearings may be roller bearings, needle bearings, bearing surfaces, low friction surfaces that allow rotational movement of the impeller shaft and prevent axial movement of the impeller shaft, or combinations thereof. The one or more bearings may be positioned above or radially inside the one or more pits such that the one or more bearings do not block the gap between the stator pits.

The one or more pits may receive one or more windings, connect the windings to a printed circuit board, support one or more windings, or function as a combination thereof. The one or more feet may extend radially outward from the axis and may be integrally connected to the axis. One or more stator legs may be coupled to the shaft and extend outwardly from the shaft to the stator feet. One or more legs, one or more feet, or both may transmit electromagnetic radiation through direct contact with the axis, proximity to the axis, or both. One or more windings may be wound around the stator arm. One or more stator feet may contact the printed circuit board. One or more stator feet may be located proximate the printed circuit board but may not touch the printed circuit board. One or more stator feet may be spaced apart by a gap. The one or more contact springs may extend at a location proximate to the gap between the one or more axes and the printed circuit board. Preferably, the one or more contact springs are positioned proximate the gap between the stator pits and extend away from the stator pits to contact the shaft.

one or more contact springs dissipate electromagnetic energy generated by the fan motor (i.e., one or more motor coils) to reduce or prevent electromagnetic interference between the fan and surrounding electrical devices, dissipate power, ground one or more shafts, It dissipates electromagnetic radiation, creates a ground path/trace, or functions as a combination thereof. The one or more contact springs may couple the one or more shafts to an electrical ground (eg, a vehicle ground circuit and/or chassis). The one or more contact springs may create an electrical path to the fan connector, ground, or both. The one or more contact springs may be connected to a printed circuit board connected to a fan connector (eg, one or more power wires or power leads). The one or more springs may have a cantilever connection with the printed circuit board, such that the one or more springs extend over the printed circuit board and into the central opening. The one or more contact springs may extend radially inward toward a center of the central opening of the printed circuit board. One or more contact springs may change from a removed state to an installed state when the printed circuit board is disposed about one or more axes. The one or more contact springs may extend into the central opening of the printed circuit board such that the one or more contact springs contact the one or more axes when the one or more axes are disposed within the central opening. For example, the printed circuit board may include a central opening in a central region of the printed circuit board that receives the axis, and one or more contact springs may extend from the printed circuit into and/or over the central opening to make contact with the axis. have. The one or more contact springs may be long enough such that the one or more contact springs create a ground path/trace when the removed state makes contact with one or more axes and flexures. The one or more contact springs may be plastically deformed, elastically deformed, flexed, flexed, or a combination thereof when in contact with one or more shafts. The one or more contact springs may not deform or flex when the one or more contact springs contact the shaft. One or more contact springs may couple one or more axes to a grounded printed circuit board. The one or more contact springs may include one or more spring contacts.

The one or more spring contacts serve to electrically connect the PCB to one or more axes. One or more spring contacts may form a fixed connection. One or more spring contacts may form a movable connection. The one or more spring contacts may be curved in contact with one or more shafts of the rotor. The one or more spring contacts may be obliquely away from the spring arm in a direction opposite to the installation direction. The one or more spring contacts may have an angle relative to the body of the one or more contact springs. For example, the one or more spring contacts may be curved at an angle of at least about 25 degrees, at least about 45 degrees, at least about 60 degrees, at least about 75 degrees, or at least about 90 degrees relative to the body, such that the one or more spring contacts are at least one It may be connected to or in contact with one or more axes. The one or more spring contacts may be bent at an angle of about 105 degrees or less. The one or more spring contacts may have a length. The length of the one or more spring contacts may contact one or more shafts. The spring contact can freely contact the shaft in the installed position. One or more spring contacts may assist in positioning the shaft through the central opening during installation. The one or more spring contacts may prevent damage to the spring arm, the one or more contact springs, or both during installation. The one or more spring contacts may prevent the spring arm from deforming if the spring arm contacts a recess, channel, bump, or combination thereof during installation. The one or more spring contacts may be located at the distal end (eg, the end closest to the axis) of the spring arm, proximate to the one or more bias bumps, or both.

The one or more spring arms function to extend between the printed circuit board and the shaft and between the body and the one or more spring contacts to extend into the central opening or a combination thereof. One or more spring arms may move with the shaft as the shaft moves. Preferably, the one or more spring arms can be biased such that when the printed circuit board is mounted relative to the shaft, the one or more spring arms move to create connection with the shaft. One or more spring arms may extend from the body to form a connection with the shaft. The one or more spring arms may include one or more bias bumps that assist the one or more spring arms to create or maintain connection with the shaft, or may include both.

The one or more bias bumps function to keep the spring in contact with the printed circuit board, in contact with one or more axes, or both. The one or more bias bumps may be biased longitudinally (eg, along the length of the one or more contact springs) or vertically (eg, in a direction parallel to the axis of rotation of the impeller shaft). The one or more bias bumps may be a curved portion, a raised portion, a semicircular portion, or a combination thereof. The one or more bias bumps may be flexible. The one or more bias bumps when flattened (ie, depressed) may longitudinally bias the one or more contact springs. The one or more bias bumps may be bent at the one or more contact springs to reduce the overall length of the one or more contact springs, such that the one or more bias bumps flex when the one or more bias bumps are biased as compared to the overall length of the one or more contact springs. increases Preferably, the one or more bias bumps may be positioned between the one or more spring contacts and the one or more anchor legs. The one or more bias bumps may be positioned between the one or more spring contacts and the connection pad. The one or more bias bumps may be positioned between the one or more anchor legs and the connection pad. Preferably, the one or more bias bumps may be located on the spring arm. The one or more spring arms may be free of bias bumps. The one or more bias bumps may be positioned between the one or more spring contacts and the one or more anchor legs.

The one or more anchor legs serve to contact or connect the printed circuit board. One or more anchor legs may extend into the printed circuit board (eg, into the anchor leg recesses). One or more anchor legs may extend through the printed circuit board. The one or more anchor legs may create a surface mount connection with a printed circuit board. Preferably, the one or more anchor legs physically connect the one or more contact springs with the printed circuit board. The one or more anchor legs may form a fixed mechanical connection, an electrical connection, or both, with the printed circuit board. One or more anchor legs may contact the ground. Preferably, the at least one contact spring comprises a plurality of anchor legs. The one or more contact springs may include two or more anchor legs. One or more anchor legs may be spaced apart by a leg gap. One or more anchor legs may be separated by a leg gap, and each anchor leg may be individually grounded, connected to a printed circuit board, or both. One or more anchor legs may assist in grounding one or more axes, one or more contact springs, or both, but a mechanical connection to the printed circuit board may be made through connection pads. One or more anchor legs may contact the traces on the printed circuit board. The one or more anchor legs may extend from the proximal side of the body, the distal side of the body, or both. For example, a spring arm may extend from a distal side of the body, and one or more anchor legs may extend from a distal side of the body. The one or more anchor legs may extend from opposite sides and/or edges of the body rather than the spring arms. The one or more anchor legs may extend from the body of the one or more contact springs.

The body of the one or more contact springs supports one or more anchor legs, one or more spring arms, and may function to create a fixed connection, contact one or more traces, create an electrical connection, or a combination thereof. . The body may be positioned between one or more anchor legs and a spring arm. The body may have any shape that creates an electrical connection and supports one or more spring arms, one or more anchor legs, or a combination thereof. All or part of the body may be movable relative to the printed circuit board. Preferably, the body is connected to the printed circuit board and creates an electrical connection therebetween. The body may have one or more connection pads that create an electrical connection between the printed circuit board and one or more contact springs, one or more support arms for supporting the body, or both.

The one or more support arms may function to prevent the body from rotating, twisting, or both. The one or more support arms may function to prevent the spring arms from rotating, twisting, or both. The one or more support arms may extend at an angle relative to the spring arm. Preferably, the at least one support arm extends perpendicular to the spring arm. The one or more support arms may extend from the body, the spring arm, or both. The support arm may be completely positioned on the first side of the printed circuit board. One or more support arms may extend from opposite sides of the body. The body may have no support arms. The one or more support arms may assist in maintaining a mechanical connection, an electrical connection, or both at the one or more connection pads.

The one or more connection pads may function to mechanically, electrically, or both, connect the one or more contact springs to the printed circuit board. The one or more connection pads may include or be conductive grease. The one or more connection pads may be soldered, welded, or both. One or more connection pads may form a permanent connection. The one or more connection pads may be body regions of the one or more contact springs in contact with a printed circuit board, traces, ground paths, or combinations thereof. The one or more connection pads may elevate the body from the printed circuit board such that the spring arm extends over the printed circuit board. The one or more connection pads may be planar with the spring arm, the body, or both. The one or more connection pads are preferably the positions of the one or more contact springs that contact the traces or printed circuit boards and create electrical and/or mechanical connections. The one or more connection pads may be connected via surface mount, through-hole connections, or both. One or more connection pads may form part of a ground path/trace. One or more connection pads may be connected to the printed circuit board.

One or more printed circuit boards (PCBs) may be grounded. The one or more PCBs may function to provide power, signals, ground, or a combination thereof to one or more circuit elements in a system (eg, a blower). One or more PCBs may connect one or more components electrically, mechanically, or both together, or together in a system. The one or more PCBs may be electrically connected to, physically connected to, or both, one or more contact springs. The one or more PCBs may connect one or more contact springs to ground such that electromagnetic radiation generated by the one or more motor coils is dissipated. The one or more PCBs may include a connecting plate connected to the one or more contact springs.

One or more connection plates of the printed circuit board function to provide and/or receive power or signals from one or more contact springs. The one or more connecting plates may electrically connect the printed circuit board and the one or more contact springs. The one or more connecting plates may physically connect the printed circuit board and the one or more contact springs. The one or more connecting plates may be surface mounted with one or more contact springs. The connecting plate may include one or more through-holes for connection to one or more contact springs. The connection plate may be connected to a ground path/track, one or more ground, ground path, or a combination thereof. The one or more connecting plates may be aligned with the one or more anchor leg recesses through the printed circuit board.

The one or more anchor leg recesses may function to receive all or a portion of the one or more anchor legs of the one or more contact springs. The one or more anchor leg recesses may receive one or more anchor legs and may receive a force or torque from one or more contact springs that are moved from a removed position to an installed position. The one or more anchor leg recesses when in contact with the one or more anchor legs may prevent a stress from being placed on the connection pad, connection plate, connection material, solder, or a combination thereof. Each anchor leg recess may be connected to one anchor leg. The anchor leg recess may allow the one or more contact springs to be spaced a predetermined distance from the axis such that the one or more contact springs are not damaged during installation. The one or more anchor leg recesses may form a friction fit with the one or more anchor legs.

1a shows a blower 2 . The blower 2 comprises a housing 4 enclosing an impeller 6 .

1b shows a cross-sectional view of the blower 2 along the line I-I. The blower 2 includes a housing 4 surrounding an impeller 6 , a rotor 10 , and a stator 30 . The rotor 10 includes an impeller 6 having a cup 12 housing one or more magnets 14 . The cup 12 is connected to an impeller shaft 16 extending into the stator 30 . The impeller shaft 16 is separated from the stator 30 and one or more shafts 34 by one or more bearings 38 . The stator 30 includes one or more motor coils 32 that generate electromagnetic radiation (EMR) 88 during operation. The EMR 88 is received via one or more shafts 34 and is on one or more printed circuit boards (PCBs) 70 connected to ground 92 via a fan connector 91 by one or more contact springs 50 . Conducted to ground path/trace 90 .

2A is a top view of a printed circuit board 70 and one or more contact springs 50 on the printed circuit board 70 .

2B is a top view of three of a printed circuit board 70 and one or more contact springs 50 spaced apart on the printed circuit board 70 .

3A, 3B, 4A, and 4B show enlarged views of the stator 30 and the stator pit 40 . The stator pits 40 are separated by a gap 42 . One or more contact springs 50 are visible through the gap 42 and are connected to the printed circuit board 70 .

5 shows a printed circuit board 70 comprising two spaced apart one or more contact springs 50 . The one or more contact springs 50 are separated by an angle α at the first side and an angle β at the second side. One or more contact springs 50 extend radially inwardly and cantileverically upwardly into a central opening 51 through which one or more axes (not shown) pass.

6a, 6b, and 6c show one or more contact springs 50 comprising one or more spring contacts 52 at a first end and one or more anchor legs 56 at a second end. One or more spring contacts 52 extend at an angle γ with respect to the spring arm 62 . A spring arm 62 extends between one or more spring contacts 52 and the body 57 . One or more anchor legs 56 are received and secured in complementary anchor leg recesses (not shown) in one or more printed circuit boards (not shown). A leg gap 60 is positioned between one or more anchor legs 56 . The body 57 of the one or more contact springs 50 includes a connecting pad 58 . One or more bias bumps 54 are located on one or more contact springs 50 . The body includes support arms 64 extending laterally outwardly therefrom.

7a, 7b, and 7c show one or more contact springs 50 comprising one or more spring contacts 52 at a first end and a body 57 at a second end. One or more spring contacts 52 extend at an angle γ with respect to the spring arm 62 . A spring arm 62 extends between one or more spring contacts 52 and the body 57 . The body 57 of the one or more contact springs 50 includes a connecting pad 58 and one or more anchor legs 56 . The one or more anchor legs are located on the side of the body 57 facing the one or more spring contacts 52 . One or more anchor legs 56 are received and secured in complementary anchor leg recesses (not shown) in one or more printed circuit boards (not shown). A leg gap 60 is positioned between one or more anchor legs 56 .

8 shows a top view of a printed circuit board 70 including two of one or more contact springs 50 in a removed state 100 . The one or more contact springs 50 include one or more anchor legs 56 , a connection pad 58 , and one or more spring contacts 52 . One or more anchor legs 56 extend into the printed circuit board 70 while the connection pads 58 are in contact with the printed circuit board 70 . One or more spring contacts 52 extend the cantilever into the central opening 51 of the printed circuit board 70 .

9 is a side perspective view of one or more contact springs 50 in an installed state 110 . The one or more contact springs 50 extend toward one or more axes from the printed circuit board 70 and include one or more spring contacts 52 in contact with the one or more axes 34 . The printed circuit board 70 has an anchor leg recess 74 from which one or more anchor legs 56 extend.

10 shows a side view of one or more contact springs 50 in an installed state 110 . The one or more contact springs 50 are flexed by bringing the one or more shafts 34 into contact with the one or more spring contacts 52 when the printed circuit board 70 is installed about the one or more shafts 34 .

Any numerical value recited herein includes all values from the lower value to the upper value in increments of one unit provided there is a separation of at least two units between any lower value and any higher value. do. By way of example, if the amount or value of a component of a process variable, such as for example temperature, pressure, time, etc., is stated, for example, between 1 and 90, preferably between 20 and 80, more preferably between 30 and 70, the present specification Values such as 15 to 85, 22 to 68, 43 to 51, 30 to 32, etc. are intended to be explicitly recited herein. For values less than one, one unit is considered to be 0.0001, 0.001, 0.01, or 0.1, as appropriate. These are merely examples of what is specifically intended, and combinations of all possible numerical values between the lowest and highest recited values are to be considered as expressly recited in a similar manner in this application.

The disclosures of all articles and references, including patent applications and publications, are incorporated by reference for all purposes. The term “consisting essentially of” to describe a combination means the identified elements, ingredients, components or steps, and other elements that do not materially affect the basic and novel characteristics of the combination. or steps. The use of the terms “comprising” or “including” to describe a combination of elements, components, components, or steps herein is intended to refer to an element, component, component, or step consisting essentially of the element, component, component, or step. Consider an example. By using the term “may” herein, any described attribute “may include” is intended to be optional.

A plurality of elements, components, components, or steps may be provided by a single integrated element, component, component, or step. Alternatively, a single integrated element, component, component, or step may be divided into a plurality of separate elements, components, components, or steps. The disclosure of “a” or “one” to describe an element, component, component, or step is not intended to exclude additional elements, components, components, or steps.

2 blower
4 housing
6 impeller
10 rotor
12 cups
14 magnet
16 impeller shaft
30 stator
32 motor coil
34 axis
38 bearings
40 stator feet
42 gap
50 contact spring
51 central opening
52 spring contact
54 bias bump
56 anchor leg
57 body
58 connection pad
60 leg gap
62 spring arm
64 support arm
70 Printed Circuit Board (PCB)
72 connection plate
74 anchor leg recess
88 Electromagnetic Radiation (EMR)
90 ground path/trace
91 fan connector
92 Ground
Remove 100
110 installation
α angle
β angle
γ angle

Claims (15)

In the blower,
a. rotor - the rotor is
i. one or more magnets; and
ii. including; an impeller having a cup for receiving the one or more magnets;
b. stator - the stator is
i. shaft; and
ii. motor winding; including -;
c. printed circuit board;
d. a central opening located in the printed circuit board, the axis extending through the central opening; and
e. the one or more contact springs connected to the printed circuit board and extending over the central opening in the printed circuit board such that when the shaft extends through the central opening, the shaft contacts one or more contact springs to ground the shaft. ; A blower comprising a. According to claim 1,
wherein said at least one contact spring comprises at least one spring contact coupling said at least one contact spring to said shaft. 3. The method of claim 2,
wherein the one or more contact springs include one or more anchor legs extending into the printed circuit board for coupling the one or more contact springs to the printed circuit board. 4. The method of claim 3,
and said at least one anchor leg extends through said printed circuit board. 5. The method according to any one of claims 1 to 4,
and the one or more contact springs include one or more bias bumps that bias the one or more contact springs about the printed circuit board, the axis, or both. 5. The method according to any one of claims 1 to 4,
wherein the at least one contact spring includes at least one bias bump positioned between the at least one spring contact and the at least one anchor leg. 5. The method according to any one of claims 1 to 4,
wherein said at least one contact spring is free of at least one bias bump. 5. The method according to any one of claims 3 to 4,
wherein said at least one anchor leg is positioned between at least one connecting pad and said at least one spring contact. 5. The method according to any one of claims 3 to 4,
and the at least one spring contact extends at an angle relative to the spring arm in a direction in which the shaft extends through the central opening. 10. The method of claim 9,
wherein the spring arm is connected to the body and forms a cantilevered connection with the body. 10. The method of claim 9,
wherein the spring arm deflects when the spring arm contacts the shaft. 10. The method of claim 9,
wherein the spring arm extends in a single plane when the spring arm contacts the shaft. 5. The method according to any one of claims 1 to 4,
wherein said at least one contact spring is a single contact spring. 10. The method of claim 9,
and an angle of said at least one spring contact with respect to said at least one spring arm is greater than or equal to 25 degrees and less than or equal to 105 degrees. 10. The method of claim 9,
The direction in which the at least one spring contact extends is opposite to the direction in which the at least one anchor leg extends.

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